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Published July 1988 | Published
Journal Article Open

An analog electronic cochlea


An analog electronic cochlea has been built in CMOS VLSI technology using micropower techniques. The key point of the model and circuit is that a cascade of simple, nearly linear, second-order filter stages with controllable Q parameters suffices to capture the physics of the fluid-dynamic traveling-wave system in the cochlea, including the effects of adaptation and active gain involving the outer hair cells. Measurements on the test chip suggest that the circuit matches both the theory and observations from real cochleas.

Additional Information

© Copyright 1988 IEEE. Manuscript received February 22. 1988. This work was supported by the System Development Foundation and by Schlumberger Palo Alto Research. IEEE Log Number 8821363. The assistance of DARPA's MOSIS chip fabrication service was vital to this research and is greatly appreciated.

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